121302500 has 90 divisors (see below), whose sum is σ = 292298622. Its totient is φ = 44000000.

The previous prime is 121302499. The next prime is 121302509. The reversal of 121302500 is 5203121.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 13017664 + 108284836 = 3608^2 + 10406^2 .

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (121302509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 302300 + ... + 302700.

Almost surely, 2^121302500 is an apocalyptic number.

121302500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121302500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146149311).

121302500 is an abundant number, since it is smaller than the sum of its proper divisors (170996122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121302500 is a wasteful number, since it uses less digits than its factorization.

121302500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 121302500 is about 11013.7414169754. The cubic root of 121302500 is about 495.0205752764.

Adding to 121302500 its reverse (5203121), we get a palindrome (126505621).

It can be divided in two parts, 121 and 302500, that multiplied together give a square (36602500 = 6050²).

The spelling of 121302500 in words is "one hundred twenty-one million, three hundred two thousand, five hundred".